Matthew 3:16-17 (KJV) 16 And Jesus, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him, and he saw the Spirit of God descending like a dove, and lighting upon him: 17 And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased.
John the Baptist was baptizing people when who walk up to the river to be baptized by him. Jesus of Galilee walked into the water and it surprised John, who said that it was He that should baptize him. Jesus said no that through John they would fulfill all righteousness and he did submerse Jesus into the Jordan. There is no special water that you have to use in order to baptize anyone. But first before you do, then make sure that they have asked Jesus to be a part of there life and that Jesus died on the cross for them. First must be met or otherwise it will be like taking a bath for them.
"Father, I know that my sins have separated me from you. I come to you and ask that Jesus Christ be apart of my life. To make my heart His place to reign in from this day forward. I know that Jesus died for my sins. In Jesus name I pray, Amen."
Lets go out today and start up conversation with people who come around you. You can start up the conversation as to how are they, how is your day or just talking with them. There is someone else there, God, and He can prompt you on when it is a good time to break in with God loves you. Might be today, tomorrow or next week , listening to them will build trust. Remember if your doing what a "good" christian does every day then they know by reputation who you are, what your motives are. That why the listening to them will get them to open up more.